This server has a single tool with critical definition gaps. The tool name 'synthesize_voice_note' is acceptable (verb_noun pattern), but the description is vague and lacks actionable context. Input schema exists but is severely underdeveloped: 'audio_stream_data' is typed as string with minimal guidance on format/encoding; 'language' has a default but no enum constraint or validation rules. No output schema is documented, the response structure is inferred from example_usage.py, not formally declared. No error handling, no recovery guidance, no parameter validation rules. The implementation is a mock stub returning hardcoded data, not a real integration. This is a proof-of-concept, not production-ready.

• Document the complete output schema with field types and descriptions: {formatted_note_md: string, transcription_accuracy: number (0-1), speaker_tags: string[]}.
• Expand tool description to 150-200 chars: explain that it transcribes audio to markdown notes, when to use it (voice dictation workflows), and what audio formats are accepted.
• Add format constraint to 'audio_stream_data': specify encoding (base64, WAV, MP3), max size, and sample rate. E.g., 'Base64-encoded WAV audio, max 10MB, 16kHz mono or stereo.'
• Replace 'language' default with an explicit enum of supported language codes: ['en', 'es', 'fr', 'de', ...]. Add description: 'ISO 639-1 language code for transcription. Defaults to en.'
• Add error handling: document failure modes (corrupted audio, unsupported language, timeout) and recovery steps. E.g., 'If transcription_accuracy < 0.8, audio may be unclear, try re-recording.'